CN104347327A - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
CN104347327A
CN104347327A CN201410618325.6A CN201410618325A CN104347327A CN 104347327 A CN104347327 A CN 104347327A CN 201410618325 A CN201410618325 A CN 201410618325A CN 104347327 A CN104347327 A CN 104347327A
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CN
China
Prior art keywords
arc
circuit breaker
current
connecting plate
limiting inductor
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CN201410618325.6A
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Chinese (zh)
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CN104347327B (en
Inventor
徐浩清
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Individual
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Individual
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Priority to CN201410618325.6A priority Critical patent/CN104347327B/en
Publication of CN104347327A publication Critical patent/CN104347327A/en
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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02Details
    • H01H73/18Means for extinguishing or suppressing arc

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  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

The invention relates to a circuit breaker and solves the problems of poor breaking capability and poor current limiting performance of the circuit breaker. The circuit breaker comprises a casing, wherein a movable contact, a static contact, an arc extinguishing device, a connecting plate and an arc striking sheet are arranged in the casing, the connecting plate is connected with the static contact, an isolation element is arranged between the arc striking sheet and the connecting plate, at least one annular current limiting coil is arranged outside the arc extinguishing device, and the two ends of the current limiting coil are respectively connected with the arc striking sheet and the connecting plate. The circuit breaker has the advantages that a novel current limiting breaking technology is provided, on the premise of not changing the casing size, the breaking performance is irrelevant to a contact material, the extremely high electric arc voltage can be fast obtained, the resistance of the circuit breaker is improved, and the electric arc can be fast extinguished, so the circuit breaker obtains high breaking capability and good current limiting performance.

Description

A kind of circuit breaker
Technical field
The present invention relates to a kind of circuit breaker, be specifically related to a kind of current limiting circuit breaker.
Background technology
Circuit breaker avoids by transship or short circuit causes the protective device of damage for the protection of circuit and electric equipment.Current omnipotent breaker or breaker of plastic casing not only have the effect of protective circuit wire and electric device, and have the critical function of limiting short-circuit current in short-circuit process.Performance mainly interrupting performance and the current limiting performance of this kind of circuit breaker, in order to improve breaking capacity and the current limiting capacity of circuit breaker, the electric arc produced in breaking course should be made to extinguish rapidly, adopt following method at present: 1 moving contact and fixed contact quick separating, elongating arc; 2 electric arcs under the guiding of arc striking component, enter arc-control device; 3 arc extinguishing grid pieces subdividing the arcs, formation series connection short arc; 4 arc extinguishing grid pieces make electric arc cool blow-out etc.Not changing dynamic and static contact separating distance, namely utilize the outline of identical circuit breaker, when being cut off by the larger short circuit current increased with power supply capacity, if only utilize above-mentioned electric arc to extend and cooling, also there is the limit in self.And existing employing special material manufactures moving contact and fixed contact, make dynamic/static contact produce electrodynamic repulsion force can separate fast, but this mode production cost is higher, also has Partial DC circuit breaker, strengthen magnetic blow-out by increase permanent magnet to make electric arc quickly through arc striking component, enter arc-control device thus extinguish fast electric arc, but there is polarity, can only be used for DC circuit in this mode because of permanent magnet, and can not be used for alternating current circuit.
Summary of the invention
For solve the breaking capacity of circuit breaker in background technology and current limiting performance difference problem, the invention provides a kind of circuit breaker.
Technical scheme of the present invention is: a kind of circuit breaker, comprise housing, moving contact, fixed contact, arc-control device, connecting plate and arc striking piece is provided with in described housing, described connecting plate is connected with fixed contact, separator is provided with between described arc striking piece and connecting plate, be provided with at least one annular current-limiting inductor outside described arc-control device, the two ends of described current-limiting inductor are connected with arc striking piece, connecting plate respectively.
As a modification of the present invention, outside described arc-control device, be provided with two annular current-limiting inductors.
As a further improvement on the present invention, described current-limiting inductor is bent to form one wave part in the outer left and right of arc-control device.
As a further improvement on the present invention, insulating part is provided with between described arc-control device and current-limiting inductor.
As a further improvement on the present invention, described insulating part is provided with storage tank, and described arc-control device inserts in storage tank.
As a further improvement on the present invention, described current-limiting inductor adopts resistance material to make.
As a further improvement on the present invention, described current-limiting inductor is by welding, riveting or be threaded and arc striking piece Joint.
As a further improvement on the present invention, described current-limiting inductor is by welding, riveting or be threaded and connecting plate Joint.
The invention has the beneficial effects as follows, when short circuit current appears in load-side, breaker actuation, moving contact is separated with fixed contact and produces electric arc.When electric current enters annular current-limiting inductor through electric arc, current-limiting inductor increases line impedance on the one hand and plays metering function, the magnetic field that current-limiting inductor produces on the other hand makes electric arc enter arc-control device fast, electric arc is split rapidly, cools and extinguish, thus reaches the object improving circuit breaker breaking capacity.The invention provides new current limliting breaking technology, under the prerequisite not changing housing size, its interrupting performance and slider material have nothing to do, high arc voltage can be obtained rapidly, improve circuit breaker impedance, make it electric arc extinguish fast, thus make circuit breaker obtain high breaking capacity and current limiting performance.And the present invention is in normal operation of circuit breaker process, electric current is directly communicated with by dynamic and static contact, and now no current circulation in current-limiting inductor, product does not produce additional energy consumption.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the embodiment of the present invention one.
Accompanying drawing 2 is the partial structurtes schematic diagram in accompanying drawing 1.
Accompanying drawing 3 is the structural representation after accompanying drawing 2 removes moving contact 2.
Accompanying drawing 4 is the structural representation after accompanying drawing 3 removes insulating part 9 and arc-control device 4.
Accompanying drawing 5 is the structural representation of current-limiting inductor 8.
Accompanying drawing 6 is the another kind of execution mode of accompanying drawing 2.
Accompanying drawing 7 is the structural representation after accompanying drawing 6 removes insulating part 9.
Accompanying drawing 8 is the another kind of execution mode of accompanying drawing 6.
Accompanying drawing 9 is the structural representation of the embodiment of the present invention two.
Accompanying drawing 10 is the partial enlargement structural representation in accompanying drawing 9.
Accompanying drawing 11 is the sectional structure schematic diagram of accompanying drawing 10.
Accompanying drawing 12 is the structural representation of the embodiment of the present invention two arc ignition portion.
Accompanying drawing 13 is the structural representation of separator 7 in accompanying drawing 9.
In figure, 1, housing; 2, moving contact; 3, fixed contact; 4, arc-control device; 5, connecting plate; 6, arc striking piece; 7, separator; 8, current-limiting inductor; 81, one wave part; 9, insulating part; 91, storage tank.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention is further illustrated:
By Fig. 1 in conjunction with shown in 2-13, a kind of circuit breaker, comprise housing 1, moving contact 2, fixed contact 3, arc-control device 4, connecting plate 5 and arc striking piece 6 is provided with in described housing 1, described connecting plate 5 is connected with fixed contact 3, separator 7 is provided with between described arc striking piece 6 and connecting plate 5, specifically, its isolation of described separator, insulating effect, the electric power that when avoiding short circuit, big current produces and arc striking piece and connecting plate are directly communicated with, electric current, without current-limiting inductor, makes current-limiting inductor inoperative.Be provided with at least one annular current-limiting inductor 8 outside described arc-control device 4, the two ends of described current-limiting inductor 8 are connected with arc striking piece 6, connecting plate 5 respectively.The invention has the beneficial effects as follows, when short circuit current appears in load-side, breaker actuation, moving contact is separated with fixed contact and produces electric arc.When electric current enters annular current-limiting inductor through electric arc, current-limiting inductor increases line impedance on the one hand and plays metering function, the magnetic field that current-limiting inductor produces on the other hand makes electric arc enter arc-control device fast, electric arc is split rapidly, cools and extinguish, thus reaches the object improving circuit breaker breaking capacity.The invention provides new current limliting breaking technology, under the prerequisite not changing housing size, its interrupting performance and slider material have nothing to do, high arc voltage can be obtained rapidly, improve circuit breaker impedance, make it electric arc extinguish fast, thus make circuit breaker obtain high breaking capacity and current limiting performance.And the present invention is in normal operation of circuit breaker process, electric current is directly communicated with by dynamic and static contact, and now no current circulation in current-limiting inductor, product does not produce additional energy consumption.
Two annular current-limiting inductors 8 are provided with outside described arc-control device 4.Certainly, in real process, current-limiting inductor 8 can be one, two, three, four or more, the first insulation board also can be wound around multi-turn current-limiting inductor, the impedance of product is increased, the current limitation effect of raising product.
Embodiment one: with reference to accompanying drawing 1-8, described current-limiting inductor 8 is bent to form one wave part 81 in the outer left and right of arc-control device 4.Such structure increases the resistance of current-limiting inductor, thus ensure that the current limiting capacity of circuit breaker, and embodiment one is breaker of plastic casing.Specifically, insulating part 9 is provided with between described arc-control device 4 and current-limiting inductor 8.The setting of insulating part avoids each parts in housing by electric arc short circuit, to affect properties of product.In particular, insulating part adopts insulation gas exhausted material to make.Pressure reduction and the striking faster of magnetic blow-out effect of gas can be produced like this by insulating part, improve the breaking capacity of product.In particular, described insulating part 9 is provided with storage tank 91, and described arc-control device 4 inserts in storage tank 91.Such structure is convenient to the installation of arc-control device, reduces the space in housing simultaneously, avoids electric arc to leak.
Described current-limiting inductor 8 adopts resistance material to make.Specifically, described resistance material adopts the material such as Copper and its alloy, manganin, constantan (copper-manganese aluminium) alloy, nichrome, Aludirome, platinum base alloy, palladium-base alloy, gold-base alloy, silver-base alloy, steel and various steel alloys to make.Adopt to there is electric conducting material and there is certain resistance and make current-limiting inductor.While making current-limiting inductor to produce larger magnetic field like this, also can consume the electric current flowing through current-limiting inductor due to larger resistance, ensure breaking capacity and the current limiting performance of product.。
Described current-limiting inductor 8 is by welding, riveting or be threaded and arc striking piece 6 Joint.Described current-limiting inductor 8 is by welding, riveting or be threaded and connecting plate 5 Joint.Such structure is convenient to the fixing of current-limiting inductor.
Embodiment one: with reference to accompanying drawing 1-8, electric arc is produced, extinguishing process is described: when short circuit current appears in load-side, breaker actuation, moving contact is separated with fixed contact and produces electric arc, at this moment circuital current by fixed contact 3 through electric arc, moving contact, circuit breaker internal conductor, breaker terminals flows to load, by magnetic blow-out effect and electric arc to contact with insulating part produce steam before and after electric arc mineralization pressure official post electric arc to arc striking piece 6 fast moving, when electric arc one end, arc root moves to arc striking piece 6, circuital current is by connecting plate, fixed contact is through current-limiting inductor 8, arc striking component 6, electric arc, moving contact, circuit breaker internal conductor, terminal flows to load, now current-limiting inductor one side increase line impedance plays metering function, current-limiting inductor generation magnetic field makes electric arc move to arc-control device direction fast on the other hand.When electric arc enter in arc-control device, electric arc is split by grid and cooling makes arc voltage rise fast, insulating part produces steam and grid and electric arc is fully cooled cause extinguishing, namely complete short circuit and disconnect under high arc temperature effect.
Implement two: embodiment two is omnipotent breaker, with reference to accompanying drawing 9-13, electric arc is produced, extinguishing process is described: when short circuit current appears in load-side, breaker actuation, moving contact is separated with fixed contact and produces electric arc, at this moment circuital current by fixed contact through electric arc, moving contact, copper litz wire, bus flows to load, make electric arc to arc striking piece fast moving by magnetic blow-out effect, when electric arc one end, arc root moves to arc striking piece, circuital current is by fixed contact, connecting plate, current-limiting inductor, arc striking piece, through electric arc, dynamic contact, circuit breaker internal conductor, bus flows to load, now current-limiting inductor one side increase line impedance plays metering function, current-limiting inductor generation magnetic field makes electric arc move to arc-control device direction fast on the other hand.When electric arc enter in arc-control device, electric arc is split by grid and cooling makes arc voltage rise fast, grid makes electric arc fully cool and causes extinguishing, namely completes circuit and disconnects.
Every technical staff's notice: although the present invention describes according to above-mentioned embodiment, invention thought of the present invention is not limited in this invention, and the repacking of any utilization inventive concept, all will include in this patent scope of patent protection.

Claims (8)

1. a circuit breaker, comprise housing (1), moving contact (2), fixed contact (3), arc-control device (4), connecting plate (5) and arc striking piece (6) is provided with in described housing (1), it is characterized in that: described connecting plate (5) is connected with fixed contact (3), separator (7) is provided with between described arc striking piece (6) and connecting plate (5), be provided with at least one annular current-limiting inductor (8) outside described arc-control device (4), the two ends of described current-limiting inductor (8) are connected with arc striking piece (6), connecting plate (5) respectively.
2. a kind of circuit breaker according to claim 1, is characterized in that being provided with outside described arc-control device (4) two annular current-limiting inductors (8).
3. a kind of circuit breaker according to claim 1, is characterized in that described current-limiting inductor (8) is bent to form one wave part (81) in left and right outward at arc-control device (4).
4. a kind of circuit breaker according to claim 1, is characterized in that being provided with insulating part (9) between described arc-control device (4) and current-limiting inductor (8).
5. a kind of circuit breaker according to claim 4, is characterized in that described insulating part (9) is provided with storage tank (91), and described arc-control device (4) inserts in storage tank (91).
6. a kind of circuit breaker according to claim 1, is characterized in that described current-limiting inductor (8) adopts resistance material to make.
7. a kind of circuit breaker according to claim 1, is characterized in that described current-limiting inductor (8) is by welding, riveting or be threaded and arc striking piece (6) Joint.
8. a kind of circuit breaker according to claim 1, is characterized in that described current-limiting inductor (8) is by welding, riveting or be threaded and connecting plate (5) Joint.
CN201410618325.6A 2014-11-06 2014-11-06 A kind of chopper Active CN104347327B (en)

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CN104347327B CN104347327B (en) 2016-12-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108074764A (en) * 2018-01-11 2018-05-25 上海良信电器股份有限公司 A kind of limitation arc path module of rotary separation switch
CN113517163A (en) * 2021-07-23 2021-10-19 西安理工大学 Strong air-blowing current-limiting high-voltage circuit breaker arc extinguish chamber

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4451718A (en) * 1981-02-27 1984-05-29 Mitsubishi Denki Kabushiki Kaisha Circuit breaker
JP2000188031A (en) * 1998-12-21 2000-07-04 Terasaki Electric Co Ltd Contact device of circuit breaker
CN102456520A (en) * 2010-10-18 2012-05-16 三菱电机株式会社 Circuit breaker
CN204144202U (en) * 2014-11-06 2015-02-04 徐浩清 A kind of circuit breaker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4451718A (en) * 1981-02-27 1984-05-29 Mitsubishi Denki Kabushiki Kaisha Circuit breaker
JP2000188031A (en) * 1998-12-21 2000-07-04 Terasaki Electric Co Ltd Contact device of circuit breaker
CN102456520A (en) * 2010-10-18 2012-05-16 三菱电机株式会社 Circuit breaker
CN204144202U (en) * 2014-11-06 2015-02-04 徐浩清 A kind of circuit breaker

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108074764A (en) * 2018-01-11 2018-05-25 上海良信电器股份有限公司 A kind of limitation arc path module of rotary separation switch
CN113517163A (en) * 2021-07-23 2021-10-19 西安理工大学 Strong air-blowing current-limiting high-voltage circuit breaker arc extinguish chamber
CN113517163B (en) * 2021-07-23 2023-02-28 西安理工大学 Strong air-blowing current-limiting type arc extinguish chamber of high-voltage circuit breaker

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